A NEW FAMILY OF PB-BASED-1222 CUPRATES PB(SR,LA)(2)LN(2)CU(2)O(Z) (LN=GD, DY, EU, AND PR)

被引：8

作者：

MIN, JR

LIANG, JK

JIN, H

WANG, C

CHEN, H

YU, YD

DONG, C

RAO, GH

机构：

[1] ACAD SINICA,INT CTR MAT PHYS,SHENYANG 110015,PEOPLES R CHINA

[2] UNIV SCI & TECHNOL CHINA,DEPT MAT SCI & ENGN,HEFEI 230026,PEOPLES R CHINA

[3] CHINESE ACAD SCI,INST PHYS,NATL LAB SUPERCONDUCT,BEIJING 100080,PEOPLES R CHINA

来源：

PHYSICA C | 1995年 / 249卷 / 1-2期

关键词：

D O I：

10.1016/0921-4534(95)00283-9

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A series of new Pb-based 1222 cuprates of the general formula Pb(Sr,La)(2)Ln(2)Cu(2)O(z) (Ln=Gd, Dy, Eu, and Pr) has been reported in this paper. In this kind of compounds, cations in the rock-salt-type monolayer completely consist of Pb ions, but the iodometric titration results indicate that the Pb ions in the rock-salt-type monolayer actually exist in the form of mixed valence states, i.e., Pb4+ and Pb2+, and the proportion of Pb4+ and Pb2+ is close to 1:1. The Pb-1222 phases Pb(Sr2-xLax) Ln(2)Cu(2)O(z) are very sensitive to sintering temperature and atmosphere, as well as the Sr content. For example, pure Pb-1222 can be only obtained at 920 degrees C in air for the composition Pb(Sr1.2La0.8) Gd2Cu2Oz. All these Pb-1222 phases are not superconducting.

引用

页码：196 / 201

页数：6

共 14 条

[1] A NEW TYPE OF CRYSTAL-STRUCTURE IN THE PB-PR-SR-CU-O SYSTEM [J].

ADACHI, S ;

INOUE, O ;

KAWASHIMA, S ;

ADACHI, H ;

ICHIKAWA, Y ;

SETSUNE, K ;

WASA, K .

PHYSICA C, 1990, 168 (1-2) :1-7

[2] SUPERCONDUCTIVITY IN 1201 LEAD CUPRATE [J].

ADACHI, S ;

SETSUNE, K ;

WASA, K .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS, 1990, 29 (06) :L890-L892

[3] SYNTHESIS AND PROPERTIES OF A SERIES OF LAYERED COPPER-OXIDE SUPERCONDUCTORS WITH A (PB0.5CD0.5) ROCK-SALT DOPANT LAYER [J].

BEALES, TP ;

FREEMAN, WG ;

HALL, SR ;

HARRISON, MR ;

PARBERRY, JM .

PHYSICA C, 1993, 205 (3-4) :383-396

[4] SUPERCONDUCTIVITY NEAR 70-K IN A NEW FAMILY OF LAYERED COPPER OXIDES [J].

CAVA, RJ ;

BATLOGG, B ;

KRAJEWSKI, JJ ;

RUPP, LW ;

SCHNEEMEYER, LF ;

SIEGRIST, T ;

VANDOVER, RB ;

MARSH, P ;

PECK, WF ;

GALLAGHER, PK ;

GLARUM, SH ;

MARSHALL, JH ;

FARROW, RC ;

WASZCZAK, JV ;

HULL, R ;

TREVOR, P .

NATURE, 1988, 336 (6196) :211-214

[5] STRUCTURAL-PROPERTIES OF (PB,CU)(SR,ND)2(HO,CE)2CU2O9-DELTA [J].

MAEDA, T ;

SAKAI, N ;

IZUMI, F ;

WADA, T ;

YAMAUCHI, H ;

ASANO, H ;

TANAKA, S .

PHYSICA C, 1992, 193 (1-2) :73-80

[6] THE EFFECTS OF CHEMICAL SUBSTITUTIONS ON THE (PB, CD)-1212 SUPERCONDUCTING CUPRATES [J].

MIN, JR ;

LIANG, JK ;

CHEN, XL ;

WANG, C ;

DONG, C ;

RAO, GH .

PHYSICA C, 1994, 229 (1-2) :169-176

[7] THE CRYSTAL-STRUCTURE OF (PB0.5CD0.5)SR2(Y1-XCAX)CU2O7 [J].

MIN, JR ;

LIANG, JK ;

CHEN, XL ;

WANG, C ;

DONG, C ;

RAO, GH .

PHYSICA C, 1994, 230 (3-4) :389-396

[8] CRYSTAL-STRUCTURE OF A NEW COPPER-OXIDE COMPOUND PB2SR2(ND1-YCEY)2CU3O10+DELTA WITH PBO-CUO-DELTA-PBO UNIT [J].

MOCHIKU, T ;

OSAWA, M ;

ASANO, H .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS, 1990, 29 (08) :L1406-L1408

[9]

SHAKED H, 1994, CRYSTAL STRUCTURES H, P9

[10] SUPERCONDUCTIVITY NEAR LIQUID-NITROGEN TEMPERATURE IN THE PB-SR-4-CA-CU-O SYSTEM, PB-SR-RARE EARTH-CA-CU-O [J].

SUBRAMANIAN, MA ;

GOPALAKRISHNAN, J ;

TORARDI, CC ;

GAI, PL ;

BOYES, ED ;

ASKEW, TR ;

FLIPPEN, RB ;

FARNETH, WE ;

SLEIGHT, AW .

PHYSICA C, 1989, 157 (01) :124-130

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